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Southeastern North Dakota Landsat TM Crop Mapping Project

Cook, Paul W., Mueller, Rick, Doraiswamy, Paul
Technical papers / ACSM/ASPRS Annual Convention & Exposition 1997 pp. -
remote sensing, Landsat, thematic maps, Triticum aestivum, spring wheat, multispectral imagery, Zea mays, corn, Phaseolus vulgaris, Glycine max, soybeans, Helianthus annuus, North Dakota
The purpose of this project was to establish a crop specific classification for a group of counties in Southeastern North Dakota. Landsat TM data (from May, June, July, and September 1994) provided 24 bands of multi spectral information (the thermal bands were not used). Extending this crop classification throughout North Dakota using AVHRR data and developing relationships to spring wheat yield are the focus of the North Dakota spring wheat yield modeling project (Doraiswamy 1996). Crop information came from both the National Agricultural Statistics Service (NASS) June Agricultural Survey (JAS) and the Farm Services Agency (FSA) for the 1994 growing season. Digitization of the field boundaries was done in ARC/INFO from both CD-ROM digital images (processed from photographs) of JAS Area aerial photography and scanned images of photocopied FSA aerial imagery. ERDAS IMAGINE software was used in the clustering and classification of the four dates of Landsat TM imagery. Although the primary focus of the project was to develop a crop specific mapping of the Landsat Analysis Area, the crop information would also serve in an analysis of spring wheat yield models for North Dakota. Classification accuracies proved to be sufficiently high to consider the final classification of spring wheat and four other crops (corn, dry beans, soybeans, and sunflower) to be of map accuracy. The clear appearance of field boundaries confirmed this classification to be a map product. One possible use of this classified image would be in updating NASS land use strata maps.